#id123{
    /*ID选择器，的值不能以数字开头*/
    border: 2px solid red;
    color: blue;
    font-size: 30px;
}
#id124{
    border: 2px solid red;
    color: black;
    font-size: 30px;
}
#id125{
    border: 2px solid red;
    color: pink;
    font-size: 30px;
}
#id222{
    border: 2px solid red;
    color: green;
    font-size: 30px;
}
#id333{
    border: 2px solid red;
    color: darkgoldenrod;
    font-size: 30px;
}
#id444{
    border: 2px solid red;
    color: rebeccapurple;
    font-size: 30px;
}
